Update readme

README.md

@@ -2,24 +2,44 @@
 
 ![Playlist Cloud Visualizer](./assets/image.png)
 
+## Features
+
+- Visualize your Spotify playlists in 3D space
+- Re-arrange the tracks in space to your liking, based on Spotify's audio analysis
+- View track information on hover, or click
+- Preview songs directly in the app
+
+Future feature ideas:
+
+- Split playlists into multiple smaller playlists based on cloud clusters
+- Filter point cloud by track attributes
+- Improve visuals and interactivity
+- Pagination of playlists as well as tracks on a playlist
+  - Currently, the app can handle up to 100 tracks in a playlist, and 100 playlists per user
+
 ## Development
 
 Run the dev server:
 
 ```sh
-npm run dev
+pnpm install
+cp .env.example .env
+# edit .env with your Spotify API credentials
+# get Spotify app credentials here: https://developer.spotify.com/dashboard/application
+# Use the default callback URL inside of .env.example when configuring your Spotify app
+pnpm run dev
 ```
 
 ## Deployment
 
 First, build your app for production:
 
 ```sh
-npm run build
+pnpm run build
 ```
 
 Then run the app in production mode:
 
 ```sh
-npm start
-```
+pnpm start
+```